Lock.



beets-Sheet I.

Patented lan. 22, |90I. C. M. BURNS & F. T. MERCER.

LOCK.

(Application led Mar. 20, 1990.1

(No Model.)

MMI 7....

m M V N W/ TIVE SSE S Patented 1an. 22,.|9'o|. c. M. BURNS @L F.T,MERCER.

LUCK.

(Application led Mar. 20, 1.900.) 2 Sheets-Sheet v (No Model.)

/N VENTO/95.'

Tm: Norms Firms cojPHoTo-Llmo.. WASHINGTON. n?. c.

CHARLES MARQUEDENT BURNS AND FREDERICK T. MERCER, OF PHILADELPHIA,PENNSYLVANIA.

LOCK.

SPECIFICATION forming part of Letters Patent No. 666,489, dated January22, 190i.

Application led March 20, 1900. Serial No- 9,413. (No model.)

To 1f/ZZ whom, it rita/y concer-rt.-

Beit known that we, CHARLES MARQUE- DENT BURNS and FREDERICK T. MERCER,citizens of the United States, and residents of Philadelphia, in thecounty of Philadelphia and State of Pennsylvania, have invented a newand useful Improvement in Locks, of which the following is a full,clear, and exact description.

One purpose of theinvention is to provide a simple and durable form oflock which may be operated by a knob or by a key, or by both, and whichmay also be provided with an eX- tral key-operated latch adapted, whendesired, to prevent the knobs from turning, while the door may bereadily opened through the medium of a key.

Another purpose of the invention is to so i locate the eXtra latch thatit can be set or released only when the door is opened.

Another purpose of the invention is to so construct the lock that thebolt from the keeper-section of the lock will be automatically made toenter the body of the lock the vmoment the door is closed and so that aspring latch or bolt is not required in the body of the lock, enablingthe face-plate of the body of the lock and the surface of the doorreceiving said plate to be perfectly smooth and without openingsappearing when the door is opened, there being no projections from theface-plate of the body of the lock at any time.

Another purpose of the invention is to construct the lock in a durableand economic manner and so that it may be used as an ontside or amortise lock and also so that no opening will appear in the door-jamb orin the keeper carried by the jarnb when the door is opened.

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the iigures.

Figure 1 is a vertical section through the improved lock and its keeper,the two parts being shown in locking engagement and the section beingtaken practically on the line 1 the keeper; and Fig. 4 is a verticalsection through the body of the lock, showing the night-latch attachmentto the same.

A represents a body-casing which is usually mortised in a door B, thecasing having the usual face-plate a, Which appears at the free verticaledge of the door, and C represents a keeper-casing which is usuallymortised in the jamb C of the door, and this oasing for the keeper islikewise provided with a suitable face-plate c. The casing C' for thekeeper carries a latch 10 and a bolt 11, the bolt and latchcorresponding to the bolt and latch usually employed in connection withthe body portion of a lock. The'latch 10 is adapted to slide out througha suitable opening in the face-plate of the casing of the keeper, as isalso the bolt 11; but the boltis forced out- Ward through the inwardmovement of the latch 10; but the latch may move inwardly Without itbeing absolutely necessary that the bolt shall move in an outwarddirection. The latch is provided with a suitable interior projection10a, Which prevents it from passing entirely out through the opening inthe face-plate c, and the bolt 11 is provided with a similar, butusually larger, extension 11, serving the same purpose and likewiseserving an additional purpose to be hereinafter described. A spring 13is suitably placed in the casing C of the keeper, and this spring tendsto normally hold the beveled or inclined edge of the latch 10 beyond theouter surface of the face-plate c. A pin 14 is secured upon the upperface of the latch 10 at its inner portion, and this pin is passedthrough an elongated opening 15, made in a lever 16. This lever isfulcrumed by a suitable pin 17 at or near its center, the pin passinginto a fixed support in the keeper. That portion of the lever 16 inwhich the pivot-pin 17 and the latch-pin 111 are located is larger thanthe remaining portion 19 and is of greater thickness, whereby a shoulder18 is formed upon IOO the upper face of the lever, as shown in Figs. 2and 3. This shoulder is inclined in direction of the rear of thekeeper-casing and is more or less diagonally located on the lever. Thesmaller end of the lever 19 extends over the extension 11a of the bolt11 and engages with the forward face of a pin 20, secured in saidextension 11a, and a spring 2l is secured to the opposite end of thelever 16, and this sp1- ing is ma'de to follow the marginal contour ofthe wider portion ot' the lever to the front edge of the same, where thespring is carried in front of the shoulder 18 and to an engagement withthe rear of the pin 20, carried by the bolt l1. Thus it will be observedthat when the latch 10 is forced inward it will so act upon the lever 16as to cause said lever, through the spring 2l, to immediately force thebolt 11 out from the keeper, provided said bolt meets with no outerobstruction; but should the bolt meet with such obstruction and thelatch 10 is still pressed inward the smaller end of the lever 16 willmove in an outward direction, placing the spring 21 under tension; butthe bolt 11 will remain stationary, and the moment the obstruction ispassed the spring 21 will act to force the bolt 11 outward from thekeeper.

A sleeve 22 is mounted in the casing A of the body of the lock, whichsleeve is of that type adapted to receive and to be turned by aknob-spindle, and the sleeve 22 is provided with oppositelyextendingarms 23, which arms are arranged for engagement with the upper and lowerportions 24 of the wide inner portion of a slide 25, the body of whichslide is usually of skeleton formation; but the rear end portion of theslide extends usually above and below the corresponding sections of thebody. The slide is guided in its movement, which is horizontal, bysuitable guide pins or ribs 26, and a lug 27 is secured to the bodyA ofthe lock within the body of the slide, through which lug a rod 28isloosely passed, the ends of the rod being secured in the ends of thebody of the slide. A spring 29 is coiled around the rod 2S and tends tonormally force the inner portion of the slide 25 against the arms of thespindle-sleeve 22.

In lieu of the ordinary bolt a plunger 30 is employed, held to travel insuitable guides and to extend into an opening 3l, made in the face-platea; but the plunger 30 at no time extends beyond the outer surface of thesaid face-plate. This plungeris held normallyin the opening 31 in amanner to close said opening through the medium of a shank 32, whichshank is provided with a head 33, engaging with the lower portion of therear end of the slide 25, and the shank 32 has guided movement in asuitable slideway 34, while a spring 35, coiled around the shank andhaving engagement with the plunger and said slideway, serves to hold theplunger in its normal or outer position. (Shown in dotted lines in Fig.4.)

In the operation of the lock above described, when the door is closedthe latch 10 of the keeper, striking, for example, an extension at aside of the face-plate of the body of the lock, will be forced inward,and the ltendency of the bolt 11 in the casing of the keeper willbetomove outward. As soon as the opening 31 in the face-plate of the bodyof the lock is brought opposite the bolt 11 this bolt will enter thebody-casing of the lock through the opening 31 and will force theplunger 30 rearward and within the casing A, as shown in positive linesin Fig. 1. The door will nowbe locked closed, and when it is desired toopen said doorthis may be accomplished from either side by turningsuitable knobs attached to the spindle employed in connection with thebody and moving outward either arm 23 of the sleeve through which thespindle passes, thus forcing the slide 25 outward and causing theplunger 30 to carry the bolt 11 of the keeper within its casing,whereupon the door may be opened, and the opening 31 in the face-plateat will be immediately closed and will be kept closed by the plunger 30.

In the event it is desired to secure the lock so that the door cannot beopened by moving the knob-spindle, the device shown in Fig. 1, andlikewise in Fig. 4, is employed. This device oonsists of a plate 36,having vertical movement in the casing A, in connection with a suitableguide 38, and in the upper end of the plate 36 a recess 37 is made,which in the upper position ot' the plate 36 receives theV lowermost arm23 from the spindle-sleeve 22. This locking plate 36 is carried upwardthrough the medium of a key passed into the casing A through a suitablekeyhole 40, and the key is adapted for lifting engagem eut with a curvedsurface 39, formed in the longitudinal outer edge of the plate 36; butan auxiliary latch-plate 42 is provided in connection with thelocking-plate 36, and this latch-plate is adapted to hold the plate 36in either its upper or in its lower position. When the plate 36 is inits lower position, a projection 45 from a wall of an opening in thebottom of the latch-plate 42 engages with a stud or projection 41,carried by a side face of the locking-plate 36, as shown in Fig. 1; butwhen the locking-plate 36 is in its upper or locking position theprojection 45 from the latch-plate will engage with the bottom portionot' the stud 41 of the locking-plate. The lockingplate can be movedupward or lowered through the instrumentality of a key, since when thekey is turned in the casing A the lower portion of the latch 42 is movedrearward, but is normally held in its forward or latching position by aspring 46. A slot 44, produced iu the locking-plate 36 and whichreceives the pivot-pin 43 of the latch-plate 42, permits thelocking-plate 36 to move upward or downward whenever the latch-plate isout of latching engagement with the same.

In Fig. 4 we have illustrated the addition of what may be termed anight-latch to the IOO IOS

IIO

body portion of the lock, and this addition consists in carrying an arm47 downward Jfrom the head 33 of the stem of the plunger 30 andproviding the arm with a downwardly-projecting member 48, adapted to beengaged by a projection 49, turned in the casing through the medium of asuitable latch-key, the arm 49 being connected with a revoluble disk 50,in which a keyhole is made. Thus when the arm 49 is turned in a suitabledirection the plunger 30 may be forced outward and the door unlockedwithout disturbing the knobspindle, as the arms 23 from thespindle-sleeve 22 may be locked at such time.

Independent of the locking device for the knob-spindle heretoforedescribed a lever 5I is employed, provided with a bifurcated section 52,adapted to receive the lower arm 23 of the spindle-sleeve 22. rlhislever 5l is provided with a suitable fulerum 53, and one end 54 of thislever extends out through a small slot 55, made in the tace-plate d ofthe bodycasing A, and by moving the outer end ofthe lever upward ordownward the locking end of the lever may be freed from engagement withthe said arm 23 or broughtin locking engagement therewith. Thus it willbe observed that after the lever 5l has been placed in lockingengagement with the spindle-sleeve 22 the door cannot be opened by a keyintrod uoed through the lower or main keyhole 40, nor can it be openedby turning the knobspindle, but must be opened by bringing the trip-arm49 of the night-latch attachment into operation.

The parts may be so arranged that they may be operated from one sideonly of the door or from both sides of the door.

Having thus described our invention, we claim as new and desire tosecure by Letters Patentl. The combination,with a keeper provided with aspring-controlled latch and a bolt operated by the inward movement ofthe latch, of a lock-casing having an opening in its faceplate adaptedto receive the bolt of the keeper, atension-controlled plunger normallyclosing said opening in the face-plate of the lock-casing, 'a receiverfor a knob-spindle, a slide operated by said receiver and operating onsaid plunger, and a locking mechanism for the receiver of theknob-spindle, as set forth.

2. The co1nbination,with a keeperprovided with a spring-controlled latchand a bolt operated by the inward movement of the latch, of alock-casing having an opening in its faceplate adapted to receive thebolt ot the keeper, a tension-controlled plunger normally closing saidopening in the face-plate of the lock-casing, a receiver for aknob-spindle, a slide operated by said receiver and operating on saidplunger, a locking mechanism for the receiver of the knob-spindle, anauxiliary lockinglatch adapted for engagement with said receiver of theknob-spindle, which latch extends into the face-plate of thelock-casing, and a key-operated mechanism arranged to force the plungerin an outward direction and cause the bolt of the keeper, when withinthe lock-casing, to be forced outward therefrom, as set forth.

3. In a lock, a keeper, a bolt in the keeper, a latch also in thekeeper, a pivoted lever with one end of which thelatch is looselyconnected, the other end of the lever being adapted to engage the boltto retract it, and a spring carried by the lever and adapted to engagethe bolt to throw it out, substantially as described.

4. In a lock, a keeper, a bolt in the keeper and provided with a lateralprojection, a latch also in the keeper, a pivoted lever having one endloosely connected with the latch and its other end projecting on oneside of the projection of the bolt, and a spring secured to the leverand having its free end extending on the side of the projection of theholt opposite that of the lever, substantially as described.

5. In a lock, a keeper, a sliding bolt in the keeper and provided with alaterally-projecting pin, a latch also in the keeper, a pvoted leverhaving one end loosely connected with the latch and its other projectingon one side of the pin of the bolt, said lever being provided with anAinclined shoulder on one face, and a plate-spring having one endsecured to the end of t-he lever connected 'with the latch and havingits free end projecting on the side of the pin of the bolt opposite thatof the said lever, said spring being adapted to be engaged by theshoulder of the lever, substantially as described.

IOO

6. In a lock, the combination with a casing having an opening in itsfront plate, and a knob-spindle receiver,of a spring-pressed slidemounted in the casing and operated by the knob spindle receiver and asliding and spring-pressed plunger in the casing and with which theslide engages, the head of the plunger being adapted to enter theopening of the face-plate of the casing and close the same,substantially as described.

7. In a lock, the combination with a casing having an openingin itsface-plate, a plunger for closing the opening of the face-plate of thecasing, a knob-spindle receiver, and means for operating the plungerfrom the knob-spindle receiver, of means for engaging the knobspindlereceiver to lock the same and prevent the plunger from being operatedthereby, substantially as described.

S. In a lock, the combination with a casing having an opening in itsface-plate, a plunger for closing the opening of the casing, aknobspindle receiver, means for operating the plunger from theknob-spindle receiver, and means for locking the knob-spindle receiver,of auxiliary means for operating the plunger when the knob-spindlereceiver is locked, substantially as described.

9. In a lock, the combination with a casing having an opening in itsface-plate, a springpressed plunger for closing the opening of theface-plate of the casing, a knob spindle re- IIO IIS

ceiver, means for operating the plunger from the knob-spindle receiver,and means for locking the knob-spindle receiver, of an auxiliary meansfor operating the plunger, comprising an arm extending from theplunger-stem, and a projection mounted to t'urn in the casing so as tobe brought into engagement with the said arm, substantially asdescribed.

10. In a lock, the combination with a casing having an opening in itsfaceplate,and a plunger in the casing for closing the opening in theface-plate of the casing, of a knob-spindle sleeve provided` withoppositely extending arms, means for operating the plunger from the saidsleeve, and a movable member having a bifurcated end adapted to receiveone of the arms of the knob-spindle sleeve and lock the same,substantially as described.

11. In a lock, the combination with a casing having an opening in itsface-plate, a plunger for closing said opening,a knob-spindle sleevehaving oppositely-extending arms, and means for operating the plungerfrom the knob-spindle sleeve, of a sliding and key-operated plate havinga bifurcated upper end adapted to receive one of the arms of the knobspindle sleeve, and a spring-pressed latch-plate carried by the slidingplate and having engagement therewith at its lower end, substantially asdescribed.

12. In a lock, the combination with a keeper provided with aspring-controlled latch, and a bolt operated by the inward movement ofthe latch, of a lock-casing having an opening in its front plate, aspring pressed plunger normally closing the opening in the face-plate ofthe casing', and adapted to be forced inward by the bolt of the keeper,a knob-spindle receiver, and a springpressed slide operated by theknob-spindle receiver and engaging the inner end of the plunger to forceit outward and cause it to carry the bolt of the keeper out of the lockcasing, substantially as described.

13. In a lock, the combination with a keeper provided with aspring-actuated latch, and a bolt operated by the inward movement of thelatch, ot' a lock-casing having an opening in its front plate, aspring-pressed plunger normally closing the opening in the front plateof the casing and adapt-ed to be forced inward by the bolt of thekeeper,`a knob-spindle receiver, a slide operated by the knob-spindlereceiver and engaging the plunger to force it outward, a locking devicefor the knob-spindle receiver, and a key-operated means for operatingthe plunger when the knob-spindle receiver is locked, substantially asdescribed.

14. In a lock, the combination with a keeper providedwithaspring-actuated latch, a bolt, and connection between the bolt andlatch, whereby the bolt will be forced outward by the inward movement ofthe latch, of a lockcasing having an opening in its front plate, aspringpressed plunger in the casing and normally closing the opening inthe casing, said plunger being adapted to be forced inward by the boltof the keeper, a knob-spindle receiver, means for operating the plungerfrom the knob-spindle receiver, a locking device for the knob-spindlereceiver, and auxiliary means for operating the plunger when theknob-spindle receiveris locked, substantially as described.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

CHARLES MARQUEDENT BURNS. FREDERICK '1. MERCER. WVitnesses:

OSCAR R. MEYERs, J oHN J. BURNS.

